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Radio halos in merging clusters of galaxies

Published online by Cambridge University Press:  06 October 2004

S. Giacintucci ,
T. Venturi ,
S. Bardelli ,
G. Brunetti ,
D. Dallacasa ,
P. Rao  and
E. Zucca
S. Giacintucci
Affiliation:
Dipartimento di Astronomia, Univ. Bologna, via Ranzani 1, I-40127 Bologna, Italy Osservatorio astronomico, via Ranzani 1, I-40127 Bologna, Italy
T. Venturi
Affiliation:
Istituto di Radioastronomia - CNR, via Gobetti 101, I-40129 Bologna, Italy
S. Bardelli
Affiliation:
Osservatorio astronomico, via Ranzani 1, I-40127 Bologna, Italy
G. Brunetti
Affiliation:
Istituto di Radioastronomia - CNR, via Gobetti 101, I-40129 Bologna, Italy
D. Dallacasa
Affiliation:
Dipartimento di Astronomia, Univ. Bologna, via Ranzani 1, I-40127 Bologna, Italy Istituto di Radioastronomia - CNR, via Gobetti 101, I-40129 Bologna, Italy
P. Rao
Affiliation:
National Centre for Radio Astrophysics, Pune University Campus, India
E. Zucca
Affiliation:
Osservatorio astronomico, via Ranzani 1, I-40127 Bologna, Italy
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Abstract

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We present the preliminary results of 235 MHz, 327 MHz and 610 MHz observations of the galaxy cluster A3562 in the core of the Shapley Concentration (SC). The purpose of these observations, carried out with the Giant Metrewave Radio Telescope (GMRT, Pune, India) was to study the radio halo located at the centre of A3562 and determine the shape of its radio spectrum at low frequencies, in order to understand the origin of this source. In the framework of the re–acceleration model, the preliminary analysis of the halo spectrum suggests that we are observing a young source (few $10^8$ yrs) at the beginning of the re–acceleration phase.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUC195 , March 2004 , pp. 86 - 88
Copyright
© 2004 International Astronomical Union